doodad
noun [ C ] US informal uk/ˈduː.dæd/ us/ˈduː.dæd/ (UK doodah)
（不记得或叫不出名字的）东西，玩意儿
anything whose name you cannot remember or do not know
Do you have the doodad, you know, the thing you attach to the end of this? 你有那种东西吗，就是固定在这个后面的那种东西？